subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/util/ISetMemory.java


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/*******************************************************************************
 * Copyright (c) 2010-2018, Gabor Bergmann, IncQueryLabs Ltd.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-v20.html.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *******************************************************************************/
package tools.refinery.viatra.runtime.matchers.util;

import java.util.function.BiConsumer;

/**
 * An {@link IMemory} that always contains values with a 0 or +1 multiplicity.
 * 
 * <p> In case a write operation causes underflow or overflow, an {@link IllegalStateException} is thrown.
 * 
 * @author Gabor Bergmann
 * @since 2.0
 */
public interface ISetMemory<T> extends IMemory<T> {
    
    @Override
    default void forEachEntryWithMultiplicities(BiConsumer<T, Integer> entryConsumer) {
        for (T t : this.distinctValues()) entryConsumer.accept(t, 1);
    }
    

    @Override
    default boolean removeOne(T value) {
        if (!removeOneOrNop(value))
            throw new IllegalStateException();
        return true;
    }


}